Why the world buys castor oil from India
Castor oil is the only commercially significant vegetable oil built on a hydroxy fatty acid, and India produces almost all of it. Roughly 85 to 90 per cent of world output comes from India, and most of that from a compact belt in north Gujarat around Mehsana, Banaskantha and Patan.
The concentration is not an accident of policy. Castor tolerates poor soil and low water, the Gujarat belt has irrigation from tube wells, and the crushing and derivative industry around Kandla has half a century of process knowledge behind it.
For a buyer, this means two things. Supply is deep and technically capable, and it is also single-origin. A poor Gujarat monsoon moves the world price of castor oil directly.
Castor oil and its derivatives are freely exportable from India as of September 2026. The commercial constraint is crop size and crushing capacity, not policy.
What India offers in castor oil and derivatives
First special grade castor oil
The premium quality: acid value at 2.0 maximum, pale colour, low moisture. It goes into pharmaceutical formulations, cosmetics, personal care and high-specification industrial uses where colour and odour matter.
Commercial grade castor oil
Higher acid value, darker colour, lower price. This is the volume grade for lubricants, greases, coatings, surfactants and plasticiser feedstock.
Hydrogenated castor oil
Hardened to a white flake or powder with a melting point near 86 degrees Celsius, used in greases, cosmetics, waxes and as a rheology modifier. It is contracted on melting point and iodine value rather than on colour.
Derivatives and downstream chemistry
12-hydroxystearic acid, sebacic acid, undecylenic acid, dehydrated castor oil, methyl ricinoleate and ethoxylates are all produced in India at scale. If your specification names a derivative rather than the oil, it is almost certainly available from the same supply base.
Reference specifications for castor oil
The table above is the working baseline. Grade names carry no legal weight, so the specification has to carry it instead.
Acid value is the primary grade determinant and the parameter that moves in storage. Hydroxyl value confirms that the ricinoleic acid content is intact, which is what most downstream chemistry depends on.
Colour is measured on the Gardner scale and matters commercially even where it has no functional effect, because it is the first thing a receiving plant sees.
Specify moisture and volatiles explicitly. Water in castor oil accelerates hydrolysis, and a cargo that ships at the upper limit will arrive with a higher acid value than it left with.
Ricinoleic acid and why substitution fails
Ricinoleic acid makes up 85 to 92 per cent of the fatty acid profile, and it carries a hydroxyl group on the twelfth carbon. That single structural feature gives castor oil its alcohol solubility, its high viscosity, its stability across a wide temperature range and its reactivity.
No other commodity vegetable oil has it. Buyers who attempt to reformulate around a cheaper oil normally return, because the property being replaced is structural rather than incidental.
This also explains the price behaviour. Demand is largely inelastic within a season because reformulation is slow, so a supply shock in Gujarat translates into price rather than into substitution.
Quality control, food safety and regulatory position
Pharmaceutical and cosmetic buyers should confirm which monograph applies in their market and obtain the corresponding certificate of analysis. Compliance is not interchangeable between pharmacopoeias.
Ricin, the toxin present in the castor bean, does not carry into the oil because it is a protein that remains in the meal and is destroyed by the standard detoxification step. Buyers should nevertheless ask for the supplier’s process description in writing, particularly if they are handling castor meal as well.
For industrial buyers the relevant documentation is the safety data sheet, the certificate of analysis and, where the destination requires it, REACH or equivalent chemical registration evidence.
Documentation for a castor oil shipment
- Commercial invoice and packing list with batch numbers
- Bill of lading or air waybill
- Certificate of origin, preferential where a trade agreement applies
- Certificate of analysis covering acid value, hydroxyl value, moisture, colour and iodine value
- Safety data sheet in the destination’s required format
- Flexitank, ISO tank or drum cleaning certificate issued before loading
- Health or free sale certificate for pharmaceutical and cosmetic grades
- Non-GMO and allergen declarations where the buyer’s category requires them
Exports are registered through APEDA for the agricultural leg, and processed chemical exports are supported by the relevant export promotion council. Ask for the IEC number and verify it independently.
Packing and shipping castor oil
Flexitanks are the normal mode for full-container volumes, carrying roughly 20 to 24 MT in a 20 ft container. ISO tanks are used for larger and more regular programmes. Drums of 200 litres, in HDPE or lined steel, serve smaller and pharmaceutical-grade lots.
Hydrogenated castor oil ships as flake or powder in 25 kg paper bags, palletised, and loads by volume rather than by weight.
Insist on the cleaning certificate before loading rather than with the documents. A flexitank that previously carried an incompatible cargo is the most common cause of an off-specification arrival on this product.
Ports, routes and transit for castor oil cargo
Kandla and Mundra handle the overwhelming majority of Indian castor oil exports, both within short inland reach of the Gujarat crushing belt. Indicative transit runs eight to twelve days to Jebel Ali, twenty-two to thirty days to North European base ports and twenty-eight to thirty-five days to the US Gulf.
Temperature is worth a thought on long routings. The oil itself is stable, but hydrogenated castor oil flake can consolidate in a hot container and arrive as a block rather than as free-flowing material.
Season, crop cycle and price formation
Castor is sown in Gujarat from July and harvested from December, with peak mandi arrivals in February. The crop is irrigated rather than purely rainfed, which dampens but does not remove weather sensitivity.
The price of castor oil is built from the mandi seed price, the crushing yield, refining or hydrogenation cost where applicable, packing and inland freight, and the exporter’s margin. Because the world depends on one state, the seed price at Deesa and Palanpur is effectively a global reference.
Buyers with continuous requirements usually contract cover across the arrival window rather than buying spot through the year, because the second half of the season carries carryover risk.
How to qualify a castor oil supplier
- Ask for the IEC number and the crushing or processing plant’s certifications, and verify them independently.
- Ask whether the supplier crushes and refines, or buys oil on the open market and repacks.
- Ask for a pre-shipment sample from the actual batch with a full certificate of analysis, not a typical analysis sheet.
- Ask to see the flexitank or tank cleaning protocol and who signs it.
- Ask for two references in your own market who have taken material in the last twelve months.
RNG Agro Exports works with crushers and processors in the Gujarat castor belt and holds FSSAI, APEDA and ISO 22000 certification. Our Indian oilseeds guide covers the wider seed basket from the same region.
Common mistakes importers make with castor oil
The first is buying on grade name alone. First special grade means what the contract says it means, and nothing more.
The second is ignoring acid value at discharge. It rises in transit, and a specification written only at loading transfers that risk to the buyer.
The third is skipping the flexitank cleaning certificate. It is the cheapest document in the pack and the most expensive one to be missing.
The fourth is buying spot through a season in which Gujarat has had a poor monsoon. On castor oil, single-origin concentration is a real risk and forward cover is the standard answer.
Frequently asked questions about castor oil
- What is the difference between first special grade and commercial castor oil?
- Grade is defined by acid value, colour and moisture rather than by name. First special grade runs to an acid value of 2.0 maximum with pale colour and is used in pharmaceutical, cosmetic and high-specification industrial applications. Commercial grade allows a higher acid value and darker colour and goes into lubricants, coatings and surfactants.
- Why is castor oil chemically unique?
- Because roughly 85 to 92 per cent of its fatty acid content is ricinoleic acid, which carries a hydroxyl group on the carbon chain. That hydroxyl group is what makes the oil soluble in alcohol, stable at high temperature and reactive enough to build a derivative chain that no other vegetable oil supports.
- What derivatives does India export?
- Hydrogenated castor oil, 12-hydroxystearic acid, sebacic acid, undecylenic acid, dehydrated castor oil, ricinoleic acid, methyl ricinoleate and a range of ethoxylates. Most of the value in the castor chain sits in these products rather than in the crude oil.
- How is castor oil shipped?
- In flexitanks for full-container volumes, in ISO tanks for larger programmes and in 200 litre HDPE or steel drums for smaller lots. A flexitank in a 20 ft container carries roughly 20 to 24 MT. Tank and flexitank cleaning certificates should be arranged before loading.
- Is castor oil supply concentrated?
- Yes. India supplies roughly 85 to 90 per cent of world output and most of that comes from a small area of Gujarat. Buyers with critical requirements should hold contracted cover across the harvest rather than buying spot through the year.
- India accounts for roughly 85 to 90 per cent of world castor output, almost all of it from Gujarat, so origin risk on this commodity is concentrated in one state’s monsoon.
- Grade is defined by acid value and colour, not by marketing names. First special grade is the food and pharmaceutical-adjacent quality; commercial grade goes into lubricants and coatings.
- Ricinoleic acid at 85 to 92 per cent is what makes the oil chemically useful. It is the reason castor oil cannot be substituted by other vegetable oils in most applications.
- The derivative chain — hydrogenated castor oil, 12-hydroxystearic acid, sebacic acid, dehydrated castor oil — is where most of the value sits, and India exports all of it.
- Oil moves in flexitanks, ISO tanks and 200 litre drums; a flexitank carries roughly 20 to 24 MT in a 20 ft container.
| Parameter | First special grade | Commercial grade | Hydrogenated (HCO) |
|---|---|---|---|
| Acid value (mg KOH/g) | 2.0 max | 4.0 max | 4.0 max |
| Colour (Gardner) | 2.0 max | 3.0 max | White flake |
| Moisture and volatiles | 0.25% max | 0.50% max | 0.20% max |
| Hydroxyl value | 160–168 | 160–168 | 150–160 |
| Iodine value | 82–90 | 82–90 | 5.0 max |
| Saponification value | 177–187 | 177–187 | 176–182 |
| Ricinoleic acid | 85–92% | 85–92% | — |
| Melting point | — | — | 85–88°C |
Acid value is the number that separates grades and the number buyers most often leave to the supplier. It rises with storage time and with moisture in the seed. Fix a ceiling at discharge, not only at loading, and the incentive to ship fresh oil sits with the right party.
| Castor Oil (First Special Grade) | On request | up |
| Castor Oil (Commercial) | On request | flat |
| Hydrogenated Castor Oil | On request | up |
| Castor Seed | On request | flat |
| Jul 15 | Castor Sowing — Gujarat |
| Dec 15 | Harvest Arrivals Begin |
| Feb 28 | Peak Mandi Arrivals |
| Jun 30 | Carryover Stock Position Clarifies |
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